Greg,I have been doing a bit of research on the GE 70 ton switcher and found that it was powered by a Cooper-Bessemer FWL-6T 6 cylinder diesel engine. see http://en.wikipedia.org/wiki/GE_70-ton_switcherI don't know if anyone makes a sound decoder representing this engine. Others might, and I hope they chime in.

While the discussion on the installation of sound in a GE 44 ton switcher is interesting, I believe it is not very pertinent to this discussion. For one thing, it did not use the same C-B prime mover as the 70 Ton Switcher. I believe it used a Caterpillar engine.

It seems the GE U9b was the only other locomotive to use the FWL-6 prime mover. However, I have been unable to find a sound decoder or sound file for that locomotive either.

Bottom line, if you are a purist, you may have to use a decoder that allows installing your own sound files and then trying to locate a suitable file. Personally, I would take the easy way out and install the Sountraxx Tsunami. In addition to sound, it has excellent motor control including at low and very low speeds where you need it for switching.

Litchfield Station did the decoder for me. They program them with the proper or closest sound.I have found them to have the best price but that was about three years ago LokSound now has the v4.0 version decoders.My decoders for the 44 ton and 70 to are older v3.5 versions and are 100 ohm speakers. I don't know what ohm speakers are used with the v 4.0They recommended the sound. You can email them and ask. That is what I did.If you search out the decoder part number from the photo, you will get links to sound samples for that particular decoder sound.SoundTraxx might have a Tsunami Micro with the correct sound and cost a little less. They use 8 ohm speakers.You want to do this right, contact Litchfield Station. Better than opinions.

My 44 ton has the two engine sound at start up. Litchfield Station suggested that sound also.Both with LokSound start at almost 1 mph using the 128 mode.I have the 44 ton at 20 mph max.The 70 ton, 40 mph max.I did a lot of research before attempting either project.I use the Tsunami and Tsunami Micro in other locos also and are very good.I have a Tsunami Micro in a old upgraded MDC Climax.You will not be able to squeeze a standard Tsunami in a 70 ton.

Dear Greg,We always favor SoundTraxx decoders, which is why we use them in our sound locos.It's really not a bad idea to have an installer do a challenging install, especially if it's your first.Have fun!the Bach-man

To be fair to Bachmann, I would suggest the Tsunami Micro. It has 750ma max current whereas, the LokSound has 500 ma max current. Both decoders are about the same size.The GE Cummins diesel switcher, 678-827014 would be the one to use.You can modify the sound CV's quite a lot with the Tsunami. Go to the below link and click on the product number to see the specs.

Way to go Rich. Nothing like getting the straight goods from someone who has done it, and complete with photos too.

Never having heard a 70 ton, I don't know how close the Cummins sound is. But I do like the way you can hear the individual cylinders fire as opposed to the blurring together with the 16 cylinder GE engine.

well here i go again! evan the wife cant help with this one, we found the sound page ok but we cant get the souns to work weve tried over 1/2 hr, things move like they are going to ,when clicked on tsu-50, nuthing.... tried others same thing.. and on other lists tsu 50 arnt listed , where did i go wrong? Grz

I clicked on the Cummins diesel option. I get another page and right below the words, Sound Title: GE Cummins Diesel Switcher, I click on the section right under those words and the sounds start up. Some sites, it can be a little diificult to identify a Hyperlink.

Rich, i dont know where i took the wrong turn but i did,i guess it was the ge befor cummings that confuzed me any how thats a super sound! would any one have a cost at todays prices for thease parts. or where i can buy them? thank you for your kindness, i think.thank you all again grz.

Litchfield Station. The link I provide not too long ago. This time, store the link in Favorites right now.

I find some people do not store the links or read much info and just depend on what someone tells them. With the links, you have a lot of info at your finger tips.Store the below link. Use it to search out the Internet. You can find tons of info you can store in Favorites and become valuable to others who do not know how to search out info.